Caracterização limnológica e influência da precipitação em reservatório de abastecimento público da Região Metropolitana de Fortaleza/CE

• Autor(a) principal: Vidal, Ticiana Fontoura
• Data de Publicação: 2014
• Outros Autores: Capelo Neto, José
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
• Texto Completo: http://www.repositorio.ufc.br/handle/riufc/58695
• topic: Limnologia; Qualidade de água; Eutrofização

The excessive presence of phytoplankton is a direct consequence of the enrichment of water by nutrients. The determination of physical, chemical and biological parameters can assess the level of eutrophication in a reservoir that is. The reservoir Gavião responsible for drinking water supply in the Metropolitan Region of Fortaleza was studied in order to characterize the limnological parameters, identify the trophic level of the water using the average Trophic State Index (TSI) and observe the influence of rain these parameters. Analyses were performed in five sampling points during the period July 2010 to June 2011, corresponding to periods of drought and rain, in order to make a comparison. The variables analyzed were: water transparency, concentration of total phosphorus and chlorophyll a for the calculation of the TSI, as well as temperature, dissolved oxygen and pH for vertical profiling. The results shown for the levels of phosphorus, its waters have been classified into eutrophic. The results showed that the temperature directly influenced the oxygen concentration and pH variation, taking the rain as a strong interfering in their concentrations. And the TSI was classified as eutrophic for the two study periods, where the TSI for rainy season was the highest, demonstrating the direct influence of rainfall on the trophic state of the reservoir.